This document explains how the persistent cache under
Cocoon executes.

Normal filesystem persistence:

When you configured this opportunity, then the Cocoon objects will be ordinary
serialized to a specified directory. This method is ok when the amount
of objects are less and your OS can handle long filenames. Some Windows OS
have problems when the filenames are very long.

Jisp based persistence:

The aim of the Jisp
based persistence is to provide a more scalable persistence. The objects
are stored in an indexed file, which uses a B-Tree alghorithm to store the objects.
This is a more elegant and fast solution, especially when you have to handle many
objects.